Unsaturated polyester resin is the most important raw material in the production of composite materials. It is mainly used to produce fiberglass reinforced plastics and can also be used to produce non-glass reinforced plastics casting resins. Fiberglass composite materials are mainly used in construction, boats, inland transportation equipment and other applications. Non-FRP cross-linked unsaturated polyester resin is used in artificial marble, artificial stone worktops, coatings, automobile repair putty and fillers, bowling balls and buttons, etc.